Fluid-pressure motor.



PATENT ED OCT. 10, 1905.

P. H. NILES. FLUID PRESSURE MOTOR.

APPLICATION FILED MAY 23, 1904.

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OYZJAM lu sJi PA'TENTED OCT. 10, 1905.

F. H. NILES. FLUID PRESSURE MOTOR.

APPLICATION IILIBD MAY 23. 1904.

2 SHEETS-SHEET 2.

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FRANCIS H. NILES, a \ne United States, and a resident oi \Jliicago, county oi Cook, and State ol lllinois, have invented certain new and useful Improvements in Fluid-Pressure Motors for Reciprocating Hammers and the Like, of which the following is declared to be a full, clear, and exact description.

The improvement relates to reciprocating steam or pneumatic motors for actuating for ing-hammers or like tools in which the too is carried directly upon the reciprocating element of the motor.

The invention seeks to provide simple and efiective valve mechanism by which the operation of the motor may be readily controlled and which will automatically prevent l l I I I Q Be it known that I,

to cushion the return or ton and prevent its pounding against the rear 1 cylinder-head.

P at entl Patented. Get. 10, 1905.

idle stroke of thq pis- The valve mechanism preferably comprises a main valve 18 between the pipes or passages 16 and 17 and a supplemental valve 19 in the pipe or passage 17 to the rear end of the cylinder. The main valve 18 is preferably of rotary type contained within a cylindrical casing 20. Passages 21 and 22, preferably formed in cored bosses on opposite sides of the valve-casing, communicate with the passages or pipes 16 and An exhaust-port 23, formed in the side of the valvecasing between the passages 21 and 22, communicates with an exhaust-chamber 24, the walls of which are preferably cast in piece with the body of the valve-casing. eX-

austi 0 e 25 leads from the chamber 24, and

Yer and said supplemental valve, whereby the latter is open when said main valve is shifted to eflect the working stroke of said piston.

11. In fluid pressure motors for reciproeating hammers and the like, the combination with the cylinder, piston and pistonrod, of a main valve easing, a passage between said. casing and the opposite ends of said cylinder, inlet and exhaust ports in said casing, a rotary valve therein for alternately connecting said passages with said inlet and exhaust ports, an operating-handle for said valve, a supplementary rotary valve in the passage leading to the rear end of said cylinder, an arm on the stem of said supplemental valve, a spring-held tappet-bar actuated by said piston at the end of its return or idle stroke, a pivoted pawl on said tappet-bar arranged to engage said arm and close said supplemental valve and a link pivoted to said hand-lever and having a pin-and-slot conneetion with said arm for opening said supplemental valve.

12. In fluid-pressure motors for reeiproeating hammers and the like, the combination with the cylinder, piston and pistonrod, of inlet and exhaust passages opening into opposite ends of said cylinder, a valve controlling the passage leading to the rear end of said cylinder, shift mechanism for closing said valve arranged to be actuated by said piston-rod at the end of the return or idle stroke of said piston and means for opening said valve.

13. In fluid-pressure motors for reciprocating hammers and the like, the combination with the cylinder, piston and pistonrod, of inlet and exhaust passages opening into opposite ends of said. cylinder, a valve controlling the passage leading to the rear end of said cylinder, adjustable tappet mech anism for closing said valve actuated by said piston on its return or idle stroke, and means for opening said valve.

14. In fluid-pressure motors for recipro eating hammers and the like, the eombina tion with the cylinder, piston and pistonrod, of inlet and exhaust passages opening into opposite ends of said cylinder, a rotary valve controlling the passage to the rear end of said cylinder, an arm on the stem of said valve, a shiftable bar, a pivoted spring-held tappet-lever arranged to be shifted by said piston-rod on the return or idle stroke of said piston, a pivoted pawl on said bar arranged to engage said valve-arm and close said valve and means for opening said valve.

FRANCIS I-I. NILES.

Witnesses ALBERTA ADAMIOK, LILLIAN PRENTIOE.

A. OEHLSGHLAGER.

PINGE NEZ FRAME. A APPLICATION FILED JAN. 23. 1903. 

